You can flash modified stock recovery from folder "patched-recovery" for MX4/M1 Note (your needs) by command: "fastboot flash recovery patched_recovery.img" and restrict the international version of firmware (in update.zip you can do all changes you want - signature will not check).

*CARE!!* If you flash index I firmware with patched recovery, USE Titanium or others to delete/freeze "System Update" from firmware. OTA UPDATE WILL BRICK YOUR DEVICE!!!

*CARE!!* Patched recovery will be rewritten on the usual stock recovery by first full android load, then after command "fastboot flash patched_recovery.img" turn off your phone and hold button "volume up" (+) and "power" before the phone starts (or delete "recovery-from-boot" as alternative).

You can flash custom recovery - and use it for your needs.

*CARE!!* DON'T try to flash stock meizu firmwares from any custom recovery, we have patched stock recovery for that.

ALWAYS DO A BACKUP!!

VERY IMPORTANT Notes:

Not allowed "strange" combinations (for example flashing not patched loader and custom recovery). If system goes to bootloop - exit from "half-brick" could be very hard, if it all possible.

Loader patch and reverse packing stock firmwares should be done everywhere - it will save your time and nerves. You should avoid version mismatch of preloader - uboot - boot.img in smartphone firmware. Effects, bugs, lags can be very different.

*IMPORTANT!!* Then, if we flash "custom firmware", it should NOT CONTAINS "uboot.img" and "preloader.bin". All this can be flashed only in stock (modified) firmware, ONLY FROM STOCK or PATCHED STOCK recovery.

"uboot.img" CAN'T BE flashed by fastboot!! Also not allowed doing experiments with "preloader.bin". BRICK probability is very high!!